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Cheap flights from Ontario to Illinois from C$ 174

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Illinois departing on 6/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Ontario to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:55 a.m. - 8:45 a.m.YTZ-MDW
1h 50mdirect
Multiple Airlines Logo
5:20 p.m. - 8:02 p.m.MDW-YTZ
1h 42mdirect
C$ 265Multiple Airlines
Find Deal
Fri, 1 May - Mon, 4 May
Air Canada Logo
10:00 a.m. - 2:55 p.m.YYZ-ORD
5h 55m1 stop
Air Canada Logo
2:00 p.m. - 4:39 p.m.ORD-YYZ
1h 39mdirect
C$ 268Air Canada
Find Deal
Thu, 15 Jan - Mon, 19 Jan
Porter Airlines Logo
2:30 p.m. - 3:20 p.m.YTZ-MDW
1h 50mdirect
Porter Airlines Logo
11:00 a.m. - 1:42 p.m.MDW-YTZ
1h 42mdirect
C$ 268Porter Airlines
Find Deal
Fri, 12 Dec - Mon, 15 Dec
United Airlines Logo
7:40 p.m. - 11:43 p.m.YYZ-ORD
5h 03m1 stop
United Airlines Logo
9:14 p.m. - 11:59 p.m.ORD-YYZ
1h 45mdirect
C$ 269United Airlines
Find Deal
Thu, 12 Feb - Mon, 16 Feb
American Airlines Logo
6:00 a.m. - 7:15 a.m.YYZ-ORD
2h 15mdirect
American Airlines Logo
3:44 p.m. - 10:43 p.m.ORD-YYZ
5h 59m1 stop
C$ 271American Airlines
Find Deal
Tue, 9 Dec - Fri, 12 Dec
Porter Airlines Logo
9:15 a.m. - 10:05 a.m.YTZ-MDW
1h 50mdirect
Porter Airlines Logo
12:45 p.m. - 3:27 p.m.MDW-YTZ
1h 42mdirect
C$ 272Porter Airlines
Find Deal
Thu, 27 Nov - Sat, 29 Nov
American Airlines Logo
6:00 a.m. - 12:56 p.m.YYZ-ORD
7h 56m1 stop
American Airlines Logo
9:45 a.m. - 12:32 p.m.ORD-YYZ
1h 47mdirect
C$ 272American Airlines
Find Deal
Thu, 27 Nov - Tue, 2 Dec
United Airlines Logo
11:00 a.m. - 12:05 p.m.YYZ-ORD
2h 05mdirect
United Airlines Logo
7:10 a.m. - 9:58 a.m.ORD-YYZ
1h 48mdirect
C$ 289United Airlines
Find Deal
Wed, 10 Dec - Fri, 9 Jan
WestJet Logo
6:30 p.m. - 9:54 a.m.YYZ-MDW
16h 24m2 stops
WestJet Logo
1:50 p.m. - 11:27 p.m.MDW-YYZ
8h 37m1 stop
C$ 377WestJet
Find Deal
Sat, 6 Dec - Tue, 9 Dec
WestJet Logo
6:30 p.m. - 9:54 a.m.YYZ-MDW
16h 24m2 stops
WestJet Logo
10:49 a.m. - 5:02 p.m.MDW-YYZ
5h 13m1 stop
C$ 379WestJet
Find Deal
Mon, 8 Dec - Mon, 15 Dec

United Airlines flights from Region of Ontario to Illinois

Our best United Airlines deals on Region of Ontario to Illinois flight tickets
United Airlines
12 Feb
YYZ7:40 p.m.Toronto Pearson Intl
5h 03m
1 stop
ORD11:43 p.m.Chicago O'Hare Intl
16 Feb
ORD9:14 p.m.Chicago O'Hare Intl
1h 45m
YYZ11:59 p.m.Toronto Pearson Intl
C$ 269
Find similar
United Airlines
10 Dec
YYZ11:00 a.m.Toronto Pearson Intl
2h 05m
ORD12:05 p.m.Chicago O'Hare Intl
9 Jan
ORD7:10 a.m.Chicago O'Hare Intl
1h 48m
YYZ9:58 a.m.Toronto Pearson Intl
C$ 289
Find similar
United Airlines
26 Dec
YYZ6:50 a.m.Toronto Pearson Intl
2h 13m
ORD8:03 a.m.Chicago O'Hare Intl
6 Jan
ORD1:13 p.m.Chicago O'Hare Intl
1h 49m
YYZ4:02 p.m.Toronto Pearson Intl
C$ 290
Find similar

American Airlines flights from Region of Ontario to Illinois

Our best American Airlines deals on Region of Ontario to Illinois flight tickets
American Airlines
9 Dec
YYZ6:00 a.m.Toronto Pearson Intl
2h 15m
ORD7:15 a.m.Chicago O'Hare Intl
12 Dec
ORD3:44 p.m.Chicago O'Hare Intl
5h 59m
1 stop
YYZ10:43 p.m.Toronto Pearson Intl
C$ 271
Find similar
American Airlines
27 Nov
YYZ6:00 a.m.Toronto Pearson Intl
7h 56m
1 stop
ORD12:56 p.m.Chicago O'Hare Intl
2 Dec
ORD9:45 a.m.Chicago O'Hare Intl
1h 47m
YYZ12:32 p.m.Toronto Pearson Intl
C$ 272
Find similar
American Airlines
9 Dec
YYZ6:00 a.m.Toronto Pearson Intl
2h 15m
ORD7:15 a.m.Chicago O'Hare Intl
10 Dec
ORD8:10 a.m.Chicago O'Hare Intl
1h 46m
YYZ10:56 a.m.Toronto Pearson Intl
C$ 278
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Region of Ontario to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 96,600 searches. Data last updated 11 November 2025.
Use the filters below to find and compare flights from Ontario to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

TorontoChicago

YTZ - MDW

YTZMDW

Toronto Island

Fri 1/5

7:55 a.m.-8:45 a.m.

Nonstop1h 50m

Chicago Midway

Mon 4/5

5:20 p.m.-8:02 p.m.

Nonstop1h 42m

C$ 265

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Thu 15/1

10:00 a.m.-2:55 p.m.

1 stop5h 55m

Chicago O'Hare Intl

Mon 19/1

2:00 p.m.-4:39 p.m.

Nonstop1h 39m

C$ 268

TorontoChicago

YTZ - MDW

YTZMDW

Toronto Island

Fri 12/12

2:30 p.m.-3:20 p.m.

Nonstop1h 50m

Chicago Midway

Mon 15/12

11:00 a.m.-1:42 p.m.

Nonstop1h 42m

C$ 268

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Thu 12/2

7:40 p.m.-11:43 p.m.

1 stop5h 03m

Chicago O'Hare Intl

Mon 16/2

9:14 p.m.-11:59 p.m.

Nonstop1h 45m

C$ 269

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Tue 9/12

6:00 a.m.-7:15 a.m.

Nonstop2h 15m

Chicago O'Hare Intl

Fri 12/12

3:44 p.m.-10:43 p.m.

1 stop5h 59m

C$ 271

TorontoChicago

YTZ - MDW

YTZMDW

Toronto Island

Thu 27/11

9:15 a.m.-10:05 a.m.

Nonstop1h 50m

Chicago Midway

Sat 29/11

12:45 p.m.-3:27 p.m.

Nonstop1h 42m

C$ 272

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Thu 27/11

6:00 a.m.-12:56 p.m.

1 stop7h 56m

Chicago O'Hare Intl

Tue 2/12

9:45 a.m.-12:32 p.m.

Nonstop1h 47m

C$ 272

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Wed 10/12

11:00 a.m.-12:05 p.m.

Nonstop2h 05m

Chicago O'Hare Intl

Fri 9/1

7:10 a.m.-9:58 a.m.

Nonstop1h 48m

C$ 289

TorontoChicago

YYZ - MDW

YYZMDW

Toronto Pearson Intl

Sat 6/12

6:30 p.m.-9:54 a.m.

2 stops16h 24m

Chicago Midway

Tue 9/12

1:50 p.m.-11:27 p.m.

1 stop8h 37m

C$ 377

TorontoChicago

YYZ - MDW

YYZMDW

Toronto Pearson Intl

Mon 8/12

6:30 p.m.-9:54 a.m.

2 stops16h 24m

Chicago Midway

Mon 15/12

10:49 a.m.-5:02 p.m.

1 stop5h 13m

C$ 379

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Illinois from

How to get the cheapest flight ticket from Region of Ontario to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Illinois?

In general, July is the cheapest month to fly from Region of Ontario to Illinois. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 304. If you don’t want to visit Illinois in July, then you should wait until June to fly from Region of Ontario, when ticket prices are also cheap, with an average price of C$ 315.

What is the cheapest day to depart on your flight to Illinois?

According to our data, Friday is the cheapest day to fly to Illinois from Region of Ontario. The lowest ticket price found for a Friday departure recently was C$ 721. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Illinois is Monday, with ticket prices averaging around C$ 1,125.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from Region of Ontario to Illinois during this time can be as low as C$ 634. If you have a flexible travel schedule, then try to avoid flying at noon when prices are C$ 1,104 on average. Flights to Illinois from Region of Ontario at noon are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest Ontario to Illinois flight route?

Fly from Toronto Island to Chicago Midway for the best Ontario - Illinois flight prices

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from Region of Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around C$ 410 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Region of Ontario for as low as C$ 273 on momondo.

What cabin class options are available on Ontario to Illinois flights?

There are 4 cabin classes available to choose from on Ontario to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Region of Ontario to Illinois flights?

No. A direct flight is the cheapest option for a flight between Region of Ontario to Illinois.

Cheap Region of Ontario to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to Illinois

Best price found

C$ 197

Fastest flight time

1h 50m

Direct flights

Every day

Airports in Illinois

2 airports
The best one-way flight to Illinois from Region of Ontario in the past 72 hours is C$ 197. The best round-trip flight deal from Region of Ontario to Illinois found on momondo in the last 72 hours is C$ 346.
The fastest flight from Region of Ontario to Illinois takes 1h 50m
Direct flights go from Region of Ontario to Illinois every day.
There are 2 airports near Illinois: Chicago O'Hare Intl (ORD), Chicago Midway (MDW)
Search flight deals

  • When did momondo last update prices for flights from Ontario to Illinois?

    Prices for flights from Ontario to Illinois are refreshed on a daily basis.

  • How many operators does momondo search for flights from Ontario to Illinois?

  • How old do you have to be to fly from Ontario to Illinois?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Region of Ontario to Illinois?

Best airlines flying from Region of Ontario to Illinois

Compare and see reviews for airlines that fly from Region of Ontario to Illinois with momondo
Airline
Rating
Free Cancellation
Price
Porter AirlinesPriceFrom C$ 198Free CancellationRating
8.0
389 reviews
Search Porter Airlines flights
American AirlinesPriceFrom C$ 264Free CancellationRating
7.2
11,047 reviews
Search American Airlines flights
Air CanadaPriceFrom C$ 265Free CancellationRating
7.1
10,437 reviews
Search Air Canada flights
United AirlinesPriceFrom C$ 283Free CancellationRating
7.4
9,012 reviews
Search United Airlines flights
WestJetPriceFrom C$ 374Free CancellationRating
7.2
3,159 reviews
Search WestJet flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Illinois?

It is quick and easy to find Ontario to Illinois flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Illinois that suits you.

Can I find flights from Ontario to Illinois with flexible booking policies on momondo?

Flights from Ontario to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Ontario to Illinois?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Ontario.

I’m not ready to book a flight from Ontario to Illinois right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Illinois from Ontario. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Illinois trip

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